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Straight chain Alkanes (C n H 2n+2 )

Straight chain Alkanes (C n H 2n+2 ). Methane CH 4. Propane C 3 H 8. Straight chain alkanes (contd). n-Butane. Naming Alkanes: Prefix - parent - suffix (none) - but- ane . Branched Chain Alkanes. 3-ethyl-2,3-dimethylpentane. 3,3-dimethylpentane .

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Straight chain Alkanes (C n H 2n+2 )

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  1. Straight chain Alkanes (CnH2n+2) Methane CH4 Propane C3H8

  2. Straight chain alkanes (contd) n-Butane Naming Alkanes: Prefix-parent-suffix (none) - but- ane

  3. Branched Chain Alkanes 3-ethyl-2,3-dimethylpentane 3,3-dimethylpentane 2,2,3-trimethylbutane

  4. Cyclic Alkanes Cyclopropane (smallest) Cyclobutane , , , Cyclohexane

  5. Substituted cycloalkanes 1,3-Dimethylcyclohexane 1,4-Dimethylcyclohexane 1-Butylcyclohexane

  6. Isomerism in organic chemistry Isomers are compounds with different physical and chemical properties but same chemical formula Two types: Structural or Constitutional isomers Stereoisomers or Configurational isomers Structural isomers: All have formula C5H12

  7. Stereoisomers Stereoisomers are compounds that have same molecular and structural formula, but differ in spatial arrangement of the atoms There are two main subtypes: Diastereomers and Enantiomers Geometrical isomers are also stereoisomers but this type of isomerism arises due to restricted rotation around rigid bonds in the molecule. Example: Cis 2-butene and trans 2-butene We will discuss more about stereoisomers later on in lab !!

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